Grate bar



e. c. RIDDELL.

GRATE BAR. I

APPLICATION FILED APR. 18, 1919.

1,402,795. Patented Jan. 10,1922.

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GRATE BAR.

APPLICATION FILED APR-18.1919.

Patented Jan. 10, 1922.

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GUY C. RIDDELL, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF T0 WILLIAM M. DAVIDSON, OF WASHINGTON, DISTRICT OF COLUMBIA.

GRATE BAR.

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Specification of Letters Patent.

Patented Jan. it}, 1922.,

Application filed April 18, 1919. Serial No. 290,954.

To all whom it may concern Be it known that l, GUY CROSBY RIDDELL, a citizen of the United States and a resident of Washington, District of olumbia, have invented a new and Improved Grate Bar, of which the following is a full, clear, and exact description.

My invention relates to grate bars for use with roasting and sintering machines, of those types which employ travelling grates which are liable to become clogged, and it has for its object to provide means for bold ing the sections of such a grate, so that the grate bars will be in position relatively to each other, which will permit of the use of a cleaning bar advantageously through the air spaces in the sections of the grates, the bars of which are held at all times in alignment.

Additional objects of the invention will appear in the following specification in which the preferred form of my invention is described.

In the drawings similar reference characters refer to similar parts in all the views, in which Figure 1 is a plan View showing a grate provided with my improvement;

Figure 2 is a sectional view of one of the grate sections shown in Figure 1 and taken on the line 22 of such figure.

Figure 3 is a sectional view on the line 3-3 of Figure 2.

Figure 4: is a fragmentary view showing in plan a travelling grate comprised of the grates shown in the preceding views, with the movable supporting means for the grates being shown in phantom.

Figure 5 is a longitudinal sectional vlew of the travelling grate shown in Figure 4.

By referring to the drawings, it will be seen that the grate is constructed in a plurality of sections A, B and C, disposed side by side, and that the grate bars D on each section extend from one side of the section to the other; these grate bars D being in alignment and with the air spaces E between the grate bars D also in alignment, so that a cleaning bar may be disposed in any one of the air spaces E in one of the end grate sections and be passed continuously through the air spaces E in the other sections of the grate which are in alignment with the said end grate section without being lifted therefrom.

Because of the fact that the grate is movable and travels on wheeled pallets or other means as is common in the art, to carry the material to be treated beneath an oil burner or other source of heat, it is important that the sections of the grate be controlled at all times in position relatively to each other, and that the several sections of the grate move together as a unit to hold the grate bars D always in alignment and the spaces therebetween also always in alignment. To

accomplish this, I provide each section with,

recesses F at one side and with extensions G at its other side, the said extensions G being disposed in recesses F, as illustrated in Fig ure 1 of the drawings.

The grate bars D in each section are held spaced apart by spacing members H, and each section of the grate has a depending web I. As illustrated to advantage in Fig ure 3 the upper edges of the spacing members H are disposed below the upper edge of the bars D so that cleaning bars (not shown) may be inserted into the spaces E between the bars D and held in these spaces during the movement of the grate sections to effectively remove any substance which may accumulate between the bars. The height of the spacing members H is such that sufficient clearance is provided for the cleaning bars so that the latter at no time strike the spacing members.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent:

1. A grate comprising a plurality of sections disposed side by side and extending transversely of the grate and having spaced grate bars extending longitudinally of the grate, the bars of all of the sections being in alinement to provide alined air spaces therebetween which extend continuously from end to end of the fuel supporting surface of the grate, certain of the bars being extended, and sections and bars adjacent to said extended portions being recessed to receive said extended portions therein, whereby said sections are held in alinement.

2. A grate comprising, a plurality of sections disposed side by side and extending section being extended at one end and recessed at the other to receive the extended ends of the bars of an adjacent section 10 whereby, said sections are 'locked against endwise movement relatively.

GUY o. RIDDELL. 

